in an iowa poll out today, president obama got another boost, leaving governor romney by four points, 49 to 45%. the president at ease, even making fun of his own gaffe. >> i want to see us export more jobs. export more products. excuse me. excuse me -- i was channelling my opponent there for a second. >> reporter: last week romney hinting at his debate approach. >> he's trying to fool people in to thinking thing that's don't and that ends during the debate. >> reporter: for days both sides have been tamping down expectations. today on the sunday talk shows. >> he's prepared more than any other candidate in i think history, certainly recent history. >> sometimes we expect a major breakthrough, the comment. that doesn't happen often. >> reporter: on "meet the press," new jersey republican governor chris christie had another take. >> thursday morning the entire narrative of the race will change. >> in an interview, anne romney reveals the greatest concern if her husband becomes president. >> my biggest concern would be for the, his mental well being. i have all the confidence in the wor